Wire-coiling apparatus



M. VOGELSONG. v WIRE COILING APPARATUS.

APPLICATION HLED JULY 2|. 1920.

1,394,378. Patelited Oct. 18,1921.

2 SHEETSSHEET I.

atto'znag M. VOGELSONG.

WIRE COILING APPARATUS.

APPLICATION FILED JULY 21, I920.

Pdtented 001;. 18, 1921.

-2 SHEETS-SHEET 2.

UNITED STATES MICHAEL VOGELSONG, 0F TOLEDO, OHIO.

WIRE-GOILING APPARATUS.

Specification of Letters Patent.

Patented Oct. 18, 1921.

Application filed July 21, 1820. Serial No. 397,943.

To all whom it may concern Be it known that 1, MICHAEL Vocnnsone, acitizen of the United States of America, residing at Toledo, Lucascounty, Ohio, have invented new and useful Fire-Coiling Apparatus, ofwhich the following is a specification.

This invention relates to the forming of wire.

This invention has utility in the winding of wire into conical orpyramidal sections, as for gas flame heated toasters.

Referring to the drawings:

Figure 1 is a fragmentaryplan view of an embodiment of the invention informing Davy screen for gas flame bread toasters;

Fig. 2 is a side elevation, parts being broken away, of the apparatus ofFig. 1;

Fig. 3 is a detail view of the mandrel;

Fig. 4 is an enlarged plan view'of a portion of the draw head;

Fig. 5 is a view of the toaster;

Fig. 6 is a fragmentary section on the line VL-VI, Fig. 2;

Fig. 7 is an enlarged plan view, with parts broken away, showing thedraw head mountmg 5 Fig. 8 is an enlarged side elevation of the mountingof Fig. 7;

Fig. 9 is an end elevation looking into the draw head; and

Fig. 10 is a side elevation of the coil former.

A frame 1 is provided on which is disposed horizontally extendingdriving shaft 2 having a spline 3 along which is reciprocable clutchcollar 4 as shifted by lever 5. This clutch member 4 may connect theshaft 2 for driving sleeve 6 extending through bearing 7 on the frame 1,to mandrel 8. In the instance of forming Davy screen cones for toasters,the mandrel 8 is made multicornered, the showing herein being heXagonal.In setting up the wire screens, the frusto-pyramidal coil is twisted tostagger the corners thereby increasing or giving ap proximate uniformityto the screen effect.

The mandrel 8 has converging end transverse terminus 9 with a groove ornotch 10 thereacross as a partial wire seat. Carried by the frame 1 is asupplemental frame 11, having an overhanging bracket 12 with a lateralnotch or seat 13, therein. Also carried by the frame 1, and on theopposite side of the mandrel 8 from the frame 11 and bracket 12, is abracket 14, carrying pivotpin 15 for swinging handle 16 which may moveinto seating relation with the notch 13 of the bracket 12, and when sopositioned, this handle 16 has a disk portion 17 against the end or face9 of the mandrel 8, completing the wire seat 10.

At a convenient location, the frame 1 may carry a reel 18 for a coil 19of wire, which in the instance of these toaster screens is desirably arather hard No. 16 gage stock.

From the spool roll or coil 19, the wire 20 may pass by way of a fixedguide 21. Herein on this guide 21 is mounted a bracket 22 carryingfreely movable horizontally eX- tending arm 23. This swingable arm 23has its free end forked into branches24. A block 25 rigidly between thebranches 24, imparts rigidity thereto, while way 26 through the block 25may guide the wire 20 off the guide disk 21 from under the arm 23.

The free ends of these branches 24 are further reinforced by right andleft threaded element 27 having medially enlarged portion 28 ofpolygonal form for adjustment. The positions of adjustment of thismember 27, 28, in operation, must be such as to have opening 29, throughthe portion 28 aline with the opening 26, for the wire 20 to threadtherethrough. /Vhen adjusted, lock nuts 30, on the member 27, may be setup, and thus give fixedly held position to all the parts adjusted.

The branches 24, beyond this adjustable reinforcement have forks 31carrying pins 32 upon which are mounted for free rotation draw head wiregripping rollers 33 having central ways or grooves 34 to engage the wire20.

In operation, when a coil of wire is wound upon the mandrel 8 to thegage mark 35, clutch lever 5-is thrown to stop the mandrel 8, the wireis cut, and the handle 16 pulled out of the seat or notch'13. Thetendency of the coil to tighten on itself and slide down the taperedmandrel toward the small end, is at once availed of, for the seat 10 isopen, and cross end 26 of the coil initially threaded into the completeseat 10, 17, may now snap away from the mandrel and the whole coil iseasily slipped off the mandrel. The operator at once swings the seatcompleting member or handle 16, back into the notch 13. In cutting thewire from the completed coil, this is desirably done with at least onebend from a mandrel corner in the portion shaped up thereon.

of the wire severed from the coil. This partially bent section permitsof very readily threading into the seat 10, 17, as the arm 23 is swungtoward the small or starting end of the mandrel 8. At once the bent endof the wire is in the seat l0, 17, the clutch 4 may be thrown in, andthe winding operation repeated. As the arm 23 is freely swingable, itautomatically follows along the mandrel 8 as the one layer or coil isThe speed may be quite high, in fact, so that with a little practice anoperator may turn out three to four completed coils per minute. The dragin so tensioning the wire as to hold it snugly for straight linedirections between the mandrel corners, with the hard wire used, meansthe adjustment of the draw head places quite a load upon the mandrel 8.The adjustment of the device 27, 28, may regulate this draw or tension.

The completed coils 36, as shown in Fig. 5, are assembled centrally of abread slice holding rame 37.

The holding of the feed wire by the drawhead is not only a drag on thedraw or pull of the mandrel in forming the coil, to in sure that suchcoil is uniformlv and firmly wound, but is a positive holder for thewire whenthe strand is cut for emoving a coil from the mandrel. Thismeans that in high speed operation, the momentum of the unwinding fromthe reel may not crowd or buckle up and disturb any wire cutfrom the hlhl 'l d con, as t e ieae o as suci WlIU inn, as

to the portion of the wire pro ecting from the head so that there mayconveniently be great speed in threading the cut-off bent portion intothe seat 10 as closed by the disk 1?. As this disk 1? extends fullyacross the face of the mandrel 8, the tight winning of the first wrap ofthe coil and the series thereafter, do not crowd oil or down upon oneside of the mandrel or over the mandrel end, and are all held forcompact symmetry as is essential for uniform product to be assembledinto the toaster.

What is claimed and it is desired to secure by Letters Patent is:

1. A rotary multi-cornered tapered mandrel provided with a wire engagingseat transversely of the end of the mandrel at the tapered regionthereof, and a member eoacting during mandrel rotation for holding awire in said seat, said member being movable as to the seat for freeingwire therefrom.

2. A rotary tapered mandrel provided with a wire engaging seattransversely of the converging end of the mandrel and within the lengthof said mandrel, and a member entirely beyond the mandrel and entirelybeyond any winding extent of the wire to be wound during windingthereof,said member being movable as to the mandrel for holding the wire to bewound in said seat and said member being movable axially to clear themandrel in allowing a mandrel formed coil freely to slip off themandrel.

3. A terminally notched wire coiling polygonal mandrel, and a membermovable against said notch to complete a wire holding seat in saidmandrel during wire coiling thereon, said member moving up only to aflush position with the mandrel in allowing the coil formed on themandrel to crowd thereagainst.

at. A terminally notched wire coiling rotary mandrel, a handle movableagainst the mandrel end as a coil receiving abutment to complete a wireholding seat in the mandrel, and a uraw head for directing wire to coilon said mandrel, said coil extending from adjacent said seat.

5. A wire coiling mandrel, and a draw head for directing wire theretoincluding a swingable arm, a guide, and in alinement with the guideadjustable wire gripping means carried by the arm.

6. A multi-cornered tapered mandrel, and a draw head for directing wirethereto including a swingable arm and a pair of adjustable groovedrollers carried by the arm.

'7. A wire coiling mandrel of pyramid frustum form, and a draw head fordirecting wire thereto including a swingable arm terminating at its freeend in a fork, adjustmeans for positioning the forks as to each other,and wire gripping grooved rollers carried by the fork.

In witness whereof I affix my signature.

MICHAEL VOGELSONG.

